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Journal articles on the topic 'Pseudomysd'

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Published: 10 December 2022

Last updated: 28 January 2023

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1

WEAVER, H. J., and L. R. SMALES. "New species of Syphacia (Syphacia) Seurat (Nematoda : Oxyuridae) from Pseudomys species (Rodentia : Muridae) from central Australia." Zootaxa 1775, no. 1 (May 23, 2008): 39. http://dx.doi.org/10.11646/zootaxa.1775.1.3.

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Syphacia (Syphacia) brevicaudata sp. nov. is described from the desert rodents Pseudomys desertor Troughton, 1936 and P. hermannsburgensis (Waite, 1896); Syphacia (Syphacia) pseudomyos sp. nov. is described from P. hermannsburgensis from western Queensland and central Northern Territory, Australia. Syphacia (Syphacia) brevicaudata is distinguished from all other species of Syphacia by having a suite of characters including an oval, dorsally and ventrally constricted cephalic plate, no cervical alae, a relatively short tail and two pairs of post-anal papillae. Syphacia (Syphacia) pseudomyos is distinguished from all other species of Syphacia by having a suite of characters including an oval, dorsally and ventrally constricted cephalic plate, no cervical or lateral alae, one pair of post-anal papillae, a relatively short tail and large eggs. Females of a putative species were distinct due to the lack of a cephalic plate but had other characters consistent with the genus. Two other putative species of Syphacia, females only, also collected from P. hermannsburgensis and having oval dorsally and ventrally constricted cephalic plates, could be distinguished from their congeners by a combination of characters including the presence of cervical alae, Syphacia sp. 2, and a protruding vulva, Syphacia sp. 3. These new species are the first records of oxyurid nematodes from the genus Pseudomys, and from Australian arid-zone rodents.

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2

Driessen, Michael M., and Robert K. Rose. "Pseudomys higginsi." Mammalian Species, no. 623 (December 3, 1999): 1. http://dx.doi.org/10.2307/3504437.

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3

Wang, Wei, Lance A. Durden, and Renfu Shao. "Two New Species of Sucking Lice (Psocodea: Phthiraptera: Hoplopleuridae) from Chestnut Mice, Pseudomys gracilicaudatus and Pseudomys nanus (Rodentia: Muridae), in Australia." Journal of Medical Entomology 58, no. 3 (February 12, 2021): 1157–65. http://dx.doi.org/10.1093/jme/tjaa289.

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Abstract We describe two new species of sucking lice in the genus Hoplopleura Enderlein, 1904 (Psocodea: Phthiraptera: Hoplopleuridae) from Australia: Hoplopleura gracilicaudatusa n. sp. from the eastern chestnut mouse Pseudomys gracilicaudatus (Gould) (Rodentia: Muridae), and Hoplopleura nanusa n. sp. from the western chestnut mouse Pseudomys nanus (Gould) (Rodentia: Muridae). Pseudomys Gray is the most speciose genus of rodents endemic to Australia with 24 species; however, only two Pseudomys species have been reported previously to be hosts of sucking lice. The description of the new species in the present study doubles the number of sucking louse species known to parasitize Pseudomys mice and increases the total number of sucking louse species known from endemic Australian rodents from 21 to 23. Pseudomys gracilicaudatus and P. nanus are closely related murines that diverged ~1 MYA with distinct and widely separated extant geographic distributions. The two new Hoplopleura species described in the present study share some morphological characters and likely co-evolved and co-speciated with their chestnut mouse hosts.

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4

Watts, CHS, PR Baverstock, J. Birrell, and M. Krieg. "Phylogeny of the Australian Rodents (Muridae) - a Molecular Approach Using Microcomplement Fixation of Albumin." Australian Journal of Zoology 40, no. 1 (1992): 81. http://dx.doi.org/10.1071/zo9920081.

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Microcomplement fixation was used to assess albumin evolution in the history of the rodents of Australia. The results confirmed a monophyletic grouping consisting of the genera Pseudomys, Mastacomys and Notomys, and showed that the genus Pseudomys is paraphyletic. The genera Conilurus, Leporillus and Mesembriomys also formed a monophyletic group. A significant finding was that Leggadina was distantly related to all Pseudomys species, and indeed may be the earliest offshoot of all Australian rodents other than Rattus. Albumin evolution in the Australian rodents has occurred in a manner far from clock-like. Mastacomys Thomas, 1882 is synonymised with Pseudomys Gray, 1832.

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5

McClure, Mark J., Peter K. Ellis, Ian M. G. Kelly, and Martin McGovern. "Esophageal Pseudomass." American Journal of Roentgenology 174, no. 4 (April 2000): 1003–4. http://dx.doi.org/10.2214/ajr.174.4.1741003.

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6

Boltshauser, Eugen, Sandra Toelle, Ianina Scheer, and Annette Hackenberg. "Torcular Pseudomass." Neuropediatrics 49, no. 03 (February 27, 2018): 225–26. http://dx.doi.org/10.1055/s-0038-1635076.

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7

Hocking, Gregory J., and Michael M. Driessen. "Status and conservation of the rodents of Tasmania." Wildlife Research 27, no. 4 (2000): 371. http://dx.doi.org/10.1071/wr97100.

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Compared with mainland Australia the diversity of rodents in Tasmania is low. In all, there are five species of native rodent in Tasmania. Three species – the water rat, Hydromys chrysogaster, the long-tailed mouse,Pseudomys higginsi and the swamp rat, Rattus lutreolus – are widely distributed. The broad-toothed rat, Mastacomys fuscus, is restricted to moorlands in western Tasmania, while the New Holland mouse, Pseudomys novaehollandiae, is restricted to coastal heath in north-eastern Tasmania and is listed as Rare under Tasmania’s Threatened Species Protection Act 1995. Only one species, Pseudomys higginsi, is endemic to Tasmania. Rattus lutreolus velutinus and Mastacomys fuscus fuscus are endemic subspecies. In addition to the native rodents, three species of exotic rodents are well established in Tasmania.

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8

Seebeck, John, and Peter Menkhorst. "Status and conservation of the rodents of Victoria." Wildlife Research 27, no. 4 (2000): 357. http://dx.doi.org/10.1071/wr97055.

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Nineteen species of rodents, in two families, have been recorded from Victoria in the modern era. Eighteen are of the family Muridae, represented by 15 native and 3 introduced species. The other species, now extinct in Victoria, was the introduced Sciurus carolinensis. Six of the native species are extinct, one is classified Critically Endangered, one Endangered and four Lower Risk – near threatened. Four of the extinct species were restricted to the semi-arid far north-west; these were Leporillus apicalis, L. conditor, Pseudomys bolami and P. desertor. The two other extinct species, Conilurus albipes and Pseudomys australis, inhabited open forest/woodland, and grassy ecosystems. Extant species include Rattus fuscipes and R. lutreolus, both in the sub-family Murinae; both are widespread and common, particularly in southern Victoria. The remaining seven species are in the sub-family Hydromyinae. Hydromys chrysogaster is widespread in waterbodies throughout the state. Notomys mitchellii and Pseudomys apodemoides occur in dry habitats in the north-west of Victoria; they are uncommon, but most of their habitat is reserved. Mastacomys fuscus, found in higher-rainfall areas of southern and eastern Victoria, from coastal dunes to alpine snowfields, is uncommon. The distribution of Pseudomys fumeus is disjunct, in four widely separated areas. It is classified as Endangered. P. shortridgei is restricted to the Grampians and south-western Victoria, where it may be locally common. The most geographically restricted rodent species in Victoria, Pseudomys novaehollandiae, is Critically Endangered and is the subject of special conservation measures. The most critical threats to rodent populations in Victoria are considered to be (1) the lack of active habitat management for those species that require early seral stages in vegetation, (2) predation by introduced carnivores, and (3) the fragmentation of species into small genetically isolated populations.

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9

Stoddart, DM, and G. Challis. "Habitat use and body form of the long-tailed mouse (Pseudomys higginsi)." Wildlife Research 20, no. 6 (1993): 733. http://dx.doi.org/10.1071/wr9930733.

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The Tasmanian long-tailed mouse (Pseudomys higginsi) is more readily trapped in upland habitats (alpine and montane forest habitats) than in lowland forests in southern Tasmania. Morphometric examination of the relationship between hind-foot length and head-body length, and tail length and head-body length, in eight species of Pseudomys reveals that P. higginsi has both a relatively longer hind foot and tail than other species in the genus, but the significance of this is unclear.

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10

Woods, RE, and FD Ford. "Observations on the behaviour of the smoky mouse Pseudomys fumeus (Rodentia: Muridae)." Australian Mammalogy 22, no. 1 (2000): 35. http://dx.doi.org/10.1071/am00035.

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This study examined aspects of behaviour in a captive colony of smoky mice, Pseudomys fumeus, over a two year period. Wherever possible behaviours observed in the captive population are compared to data collected in a study of a wild population in south-eastern New South Wales. This paper provides the first recorded observations of behavior in this species. Both captive and wild populations of P. fumeus display strictly nocturnal circadian activity rhythms. In the captive study, P. fumeus were found to exhibit social interactions similar to some previously studied Pseudomys species. However, in the wild, the species was found to communally nest during the breeding season, behaviour not observed in other Pseudomys from similar habitats. P. fumeus in captivity can have more than two litters in one breeding season which suggests that their reproductive parameters are more flexible than previous studies of wild populations have shown. Field data indicate that post-partum oestrus can occur in this species, and that gestation lasts for approximately 30 days, although these observations are based on a small sample.

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11

Breed, W. R. "Taxonomic Implications of Variation in Sperm Head Morphology of the Australian Delicate Mouse, Pseudomys delicatulus." Australian Mammalogy 21, no. 2 (1999): 193. http://dx.doi.org/10.1071/am00193.

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The structural organisation of the sperm head of individuals included within the species Pseudomys delicatulus, and P. patrius, which has recently been separated from P. delicatulus, is detailed here. P. patrius has a sperm type with three hooks - a feature shared with most other species of Pseudomys including all three other pebble-mound mice. By contrast, P. delicatulus has a very different sperm type that lacks the three hooks and in this species two morphotypes appear to be present. One is highly variable, generally pear-shaped with a basal attachment of the sperm tail, and is present in individuals which occur on the mainland of the Northern Territory and Western Australia. The other, which is present in individuals in Queensland and on West Island and Groote Eylandt off the north coast of Northern Territory, is bilaterally flattened with a single, attenuated, blunt apical hook and tail attached to the lower concave surface. These results (1) support the recent separation of P. patrius from P. delicatulus and, (2) suggest the presence of a cryptic species or subspecies within Pseudomys delicatulus as presently constituted.

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12

Driessen, M. M. "Observations on the Diets of the Long-Tailed Mouse, Pseudomys higginsi, and the Velvet-furred Rat, Rattus lutreolus velutinus, in Southern Tasmania." Australian Mammalogy 21, no. 1 (1999): 121. http://dx.doi.org/10.1071/am99121.

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Diets of two sympatric murids, Pseudomys higginsi and Rattus lutreolus were studied by faecal analysis during spring and summer in wet sclerophyll forest and sub-alpine woodland on Mount Wellington, Tasmania. Both species were omnivorous but their overall diet differed with Pseudomys higginsi consuming a broader range of food items than Rattus lutreolus. P. higginsi diet tended to reflect the difference in food availability between locations and between seasons. Main items in the diet of P. higginsi at both locations were fruits, monocotyledons (mostly grasses), mosses, fungi and invertebrates. Proportions of fruits and mosses in the diet differed between locations. Mosses and ferns were most common in the diet during spring whereas monocotyledons and some dicotyledons were more common during summer. R. lutreolus diet showed little variation between locations and seasons. Main items in the diet of R. lutreolus were monocotyledons (sedges and grasses), fungi and invertebrates. The importance of mosses and fungi as dietary items are discussed. The results of this study support a developing view of resource partitioning between sympatric Rattus and Pseudomys populations in Tasmania and New South Wales.

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13

Wilson, BA. "The Ecology of Pseudomys novaehollandiae (Waterhouse, 1843)." Wildlife Research 18, no. 2 (1991): 233. http://dx.doi.org/10.1071/wr9910233.

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The distribution, habitat preferences and population ecology of Pseudomys novaehollandiae in the Eastern Otways, Victoria, were studied from 1985 to 1989. The species has a patchy distribution and was captured at only four sites in heathy woodland-open forest. The population density of the species was low (0-3.1 ha-1) and the breeding season was from spring to summer. The vegetation on two trapping grids was classified into five floristic groups. Four small mammal species (Rattus lutreolus, Antechinus stuartii, Mus musculus and P. novaehollandiae) exhibited preferences for different floristic groups. There was evidence that P. novaehollandiae interacted, or competed, with M. musculus in one floristic group. Pseudomys novaehollandiae preferred two floristic groups which had high floristic diversity. Within these groups the species was associated with low dense vegetation cover. The decline of populations of P. novaehollandiae in this study is likely to be related to post-fire successional changes in the vegetation: either to loss of plant species diversity, or to loss of particular species or to low vegetation cover. Strategic burning of small areas within the preferred floristic vegetation is recommended to maintain a mosaic of suitable successional ages for the conservation of this endangered species.

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14

Taylor, J. Mary, and John H. Calaby. "Reproductive strategies of Pseudomys nanus and Pseudomys delicatulus (Rodentia : Muridae) from the monsoonal tropics of the Northern Territory." Australian Journal of Zoology 52, no. 3 (2004): 271. http://dx.doi.org/10.1071/zo03011.

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In the highly punctuated monsoonal climate of the Alligator Rivers area of Australia, Pseudomys nanus and Pseudomys delicatulus breed in the latter part of the monsoon season and can extend their breeding activity into spring. P. nanus may reproduce virtually year-round, presumably when environmental conditions are favourable. In both species, the predominance of young non-breeding adults and juveniles in the spring signals a new infusion of animals into the population and a large population turnover at the expense of older members. The young survivors of the seasonal transition from extremely dry to intensely wet conditions then become the primary contributors to the next major breeding episode. This study is based on histological evidence from the reproductive systems of both sexes.

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15

Woinarski, J. C. Z. "The conservation status of rodents in the monsoonal tropics of the Northern Territory." Wildlife Research 27, no. 4 (2000): 421. http://dx.doi.org/10.1071/wr97047.

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The rodent fauna of the monsoonal tropics of the Northern Territory comprises 23 native species and two introduced species. Three species (Zyzomys maini, Z. palatalis and Pseudomys calabyi) are endemic to the area, and four species (Pseudomys hermannsburgensis, P. desertor, P. johnsoni and Notomys alexis) enter the area only on its southern (arid) fringe. The rodent fauna is closely related to that of the Kimberley, Western Australia. Distribution maps for all species are given. One species (Z. palatalis) has an extremely restricted range and is regarded as critically endangered. The lack of information on the distribution and abundance of rodents in general in this area is evident in the national classification of five of its species (Xeromys myoides, Mesembriomys macrurus, Notomys aquilo, Pseudomys desertor and Pseudomys johnsoni) as Insufficiently Known. The two introduced rodents (Mus domesticus and Rattus rattus) are virtually restricted to urban and highly modified areas, although R. rattus also occurs on one uninhabited island. In contrast to that of much of the rest of Australia, this rodent fauna has apparently retained its full complement of species since European colonisation. This enduring legacy is attributable largely to the relatively limited modification of its environments. However, three species (Mesembriomys macrurus, Rattus tunneyi and Conilurus penicillatus) appear to be declining. The pattern of decline in these species, and in the mammal fauna generally, is obscured by the very limited historical data. However, declines appear most pronounced in the cattle country of the Victoria River District and Gulf regions. Priorities for the management of this rodent fauna include survey of poorly known areas, survey for poorly known species, monitoring of rodent communities, and landscape-wide management of the three pervasive processes with probably greatest impacts – fire, grazing and feral predators.

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16

Anstee, S. D., J. D. Roberts, and J. E. O'Shea. "Social Structure and Patterns of Movement of the Western Pebble-mound Mouse, Pseudomys chapmani, at Marandoo, Western Australia." Wildlife Research 24, no. 3 (1997): 295. http://dx.doi.org/10.1071/wr96093.

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Mounds of the western pebble-mound mouse, Pseudomys chapmani, are found throughout the species’ Pilbara range in areas with iron-ore deposits of economic significance. Translocation techniques are being examined as a means of minimising the impact of mining on this species. In the absence of detailed information on the biology of Pseudomys chapmani, translocation is inadvisable. To provide such basic information, animal densities, mound demographics and population sizes, and home-range and core-area sizes were obtained by a combination of trapping and radio-tracking. Mounds of Pseudomys chapmani were found to be inhabited by social groups of up to 12 animals. Estimates of home-range size gave mean ( s.e.) values of 14·4 6·7 ha and 4·6 2·7 ha for males and females, respectively; core areas were recorded at 0·93 0·29 ha for males and 0·29 0·16 ha for females. Considerable overlap of home ranges was recorded between individuals from the same and different mounds. Overlap at the core-area level occurred only between individuals from the same mound. The high level of social complexity and mound fidelity indicates that translocations should be directed at the level of the social group rather than at the level of the individual.

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17

Bradley, AJ, CM Kemper, DJ Kitchener, WF Humphreys, and RA How. "Small Mammals of the Mitchell Plateau Region, Kimberley, Western-Australia." Wildlife Research 14, no. 4 (1987): 397. http://dx.doi.org/10.1071/wr9870397.

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This paper presents the background for a series on the biology of small mammals in the Mitchell Plateau region, an area characterised by a wet-dry tropical climate. From June 1981 to December 1982, 19 species of small terrestrial mammals were captured at Mitchell Plateau. Of 17 species captured on eight mark-release grids, 13 clustered into four significant groups which reflected the major habitats of the region: (1) Sminthopsis virginiae, Leggadina sp. and Pseudomys nanus in riparian and plateau escarpment sites; (2) Phascogale tapoatafa, Trichosurus arnhemensis and Pseudomys laborifex in plateau open forest; (3) Conilurus penicillatus and Mesembriomys macrurus in open woodland and coastal mosaics; (4) the commoner species Dasyurus hallucatus, Isoodon macrourus, Melomys sp. cf. burtoni, Zyzomys argurus and S. woodwardi in an array of habitats. Rattus tunneyi, Pseudantechinus sp., Wyulda squamicaudata and Planigale maculata did not cluster significantly with other species. Two species, Pseudomys delicatulus and Mesembriomys gouldii, were represented by single specimens captured outside the capture-mark-release grids, in sandstone and plateau woodland respectively. Open forests, particularly on the lateritic plateau surfaces, had the richest and most diverse mammal assemblage over the entire study period. The vine thickets and sandstone contained relatively stable populations of fewer species, and several habitats had seasonally variable populations and species.

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18

Meier, Robert A., and George G. Hartnell. "MRI of Right Atrial Pseudomass." Journal of Computer Assisted Tomography 18, no. 3 (May 1994): 398–401. http://dx.doi.org/10.1097/00004728-199405000-00010.

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19

Palacios, Enrique, and Galdino Valvassori. "Pseudomass in the Jugular Bulb." Ear, Nose & Throat Journal 77, no. 7 (July 1998): 526. http://dx.doi.org/10.1177/014556139807700705.

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20

Breed, W. G. "Interspecific Variation of Testis Size and Epididymal Sperm Numbers in Australasian Rodents with Special Reference to the Genus Notomys." Australian Journal of Zoology 45, no. 6 (1997): 651. http://dx.doi.org/10.1071/zo97010.

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When testis mass is plotted against body mass for Australasian rodents, an allometric relationship is found to occur. Nevertheless, considerable interspecific variability in testis mass as a percentage of body mass is evident for the different species, with the smallest relative size of testes in the Australian rodents being present in most Notomys and several Pseudomys species. In other Pseudomys, and nearly all species of the other genera, the relative size of testes is considerably greater. Notomys and Pseudomys with small testes tend to have a lower relative volume of seminiferous tubules to the total testicular mass than species with relatively large testes. These species also generally have small cauda epididymides and a less dense sperm population in this region. The data thus clearly indicate far fewer sperm are produced, and stored, in the male reproductive tract of these animals. The causative reason(s) for the differences in relative testis size are discussed and the possibility that it relates to variation in breeding system, and hence potential intermale sperm competition, is considered. However, the scant data available do not indicate an obvious association among these parameters. It is thus suggested that, in Notomys at least, the relatively small testes may relate to the other divergent features of the reproductive tract one of the consequences of which may be a highly efficient sperm-transport system.

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21

Fox, BJ, DG Read, E. Jefferys, and J. Luo. "Diet of the Hastings River mouse (Pseudomys oralis)." Wildlife Research 21, no. 5 (1994): 491. http://dx.doi.org/10.1071/wr9940491.

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The diet of the Hastings River mouse (Pseudomys oralis) has been assessed from 90 faecal samples collected from 42 animals in nine different locations in New South Wales. Repeated sampling of individuals over periods of 4-6 days gave consistent results confirming the reliability of the dietary estimation techniques used in this study. No differences were found between males and females when tested at two different sites. Eight dietary items were identified with the mean percentage occurrences for summer and winter, respectively, being: leaf, 45, 77; seed, 44, 12; insect, 7, 2; stem, <l , 7; flower, 2, <l ; pollen, 1, <1; fern sporangia, <1, 1; and fungi, <l , 1. A two-way ANOVA of geographical locality and season (summer v. winter) showed no locality effect, but a strongly significant season effect for leaf (P <0.0001), seed (P <0.0001) and insect (P < 0.007). A similar multivariate two-way ANOVA for overall diet also showed a significant season effect, but no locality effect. The summer co-dominance of leaf and seed shifted to almost complete dominance of the winter diet by leaf material. This differs from the trends in dietary composition of all other species of Pseudomys studied, which broaden their diet in winter to incorporate many different types of food. It is not clear whether this reflects an active choice by P. oralis to select for increased amounts of leaf, or a default selection caused by the lack of alternative dietary items, such as fungi, which are utilised in winter by the other species.

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22

Pyke, GH, and DG Read. "Hastings River mouse Pseudomys oralis: a biological review." Australian Mammalogy 24, no. 2 (2002): 151. http://dx.doi.org/10.1071/am02151.

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The distribution and abundance of the Hastings River mouse (Pseudomys oralis) have declined since the Pleistocene, and it is now one of Australia?s rarest mammals. It was presumed extinct until rediscovered in south-east Queensland in 1969. Because of this past, and apparently ongoing decline, as well as the nature and extent of known or presumed threats, P. oralis is considered threatened with extinction. Like other ?threatened? species, P. oralis is presently the subject of a recovery process, which aims to improve its conservation status. Essential to the development of a recovery strategy for any species is a reasonable knowledge of its biology and the nature and extent of threatening processes. While there has been considerable recent interest in the biology of P. oralis and possible threats to its populations, there has not been a comprehensive and detailed review of its biology. The present review indicates that the necessary information for developing a recovery strategy for P. oralis is lacking. Progress has been made in understanding habitat requirements and developing the ability to predict its presence or absence, as well as knowledge of the biology of individuals. However, we presently have little understanding of the population biology or community ecology of the species. We do not, in particular, know what factors determine the distribution and abundance of P. oralis, nor how these factors operate. In this situation we can potentially provide some protection for P. oralis through strategies that avoid or minimise human impacts on habitat areas, but a strategy aimed at species recovery is impossible.

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23

Meek, PD, K. McCray, and B. Cann. "New records of Hastings River mouse Pseudomys oralis from State Forest of New South Wales pre-logging surveys." Australian Mammalogy 25, no. 1 (2003): 101. http://dx.doi.org/10.1071/am03101.

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THE Hastings River mouse Pseudomys oralis is one of the rarest of the pseudomyines and is patchily distributed across New South Wales (NSW) and Queensland, although it is believed to have been more common in the past (Watts and Aslin 1981). It is currently listed as ‘endangered’ at both State (NSW) and Commonwealth levels and there have only been three ecological studies of the species (Townley 2000; Keating 2000; Meek 2002a). One interesting aspect of Pseudomys ecology is their patchy distribution across the landscape (Watts and Aslin 1981), even where habitat appears unaltered and undisturbed. Historically, P. oralis was believed to be widely dispersed, preferring creek and gully habitats dominated by Cyperaceae and Juncaceae species (Read 1993a; Pyke and Read 2002). New evidence indicates that water courses are not as important as previously believed with animals being trapped across a range of topography and habitat types (Townley 2000; Meek 2002a).

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24

Mann, Gurdeep S., Ashley J. Robinson, Jacques G. LeBlanc, and Manraj K. S. Heran. "Abdominal Aortic Pseudomass in a Child." Journal of Ultrasound in Medicine 27, no. 2 (February 2008): 307–10. http://dx.doi.org/10.7863/jum.2008.27.2.307.

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25

ADDAI, THEODORE R., and JAMES L. POTTS. "Left Atrial Pseudomass by Transthoracic Echocardiography." Echocardiography 16, no. 1 (January 1999): 31. http://dx.doi.org/10.1111/j.1540-8175.1999.tb00782.x.

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26

Stanford, W. "Pseudomass at CT and MR imaging." Radiology 183, no. 3 (June 1992): 876. http://dx.doi.org/10.1148/radiology.183.3.1584951.

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27

Lamb, Christopher R., and Myra Forster-van Hijfte. "ULTRASOUND CORNER BEWARE THE GASTRIC PSEUDOMASS." Veterinary Radiology Ultrasound 35, no. 5 (September 1994): 398–99. http://dx.doi.org/10.1111/j.1740-8261.1994.tb02060.x.

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28

Chou, Naomi, Rebecca Burbridge, and Sarah Karram. "Pancreatic Fungal Ball Presenting as Pseudomass." ACG Case Reports Journal 4, no. 1 (2017): e55. http://dx.doi.org/10.14309/crj.2017.55.

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29

Pereira Arias, J. G., V. Ullate Jaime, R. Ateca Díaz-Obregón, J. M. Gutiérrez Díaz, J. R. Berreteaga Gallastegui, and I. Carral Tellítu. "Pseudomasa renal izquierda infrecuente: ectopia esplénica." Actas Urológicas Españolas 26, no. 8 (January 2002): 574–78. http://dx.doi.org/10.1016/s0210-4806(02)72830-1.

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30

Read, J., P. Copley, and P. Bird. "The distribution, ecology and current status of Pseudomys desertor in South Australia." Wildlife Research 26, no. 4 (1999): 453. http://dx.doi.org/10.1071/wr97051.

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Recent surveys have shown that the desert mouse (Pseudomys desertor), which was once considered to be rare in South Australia, is relatively widespread throughout the north-west of the State. However, historical localities in the Flinders Ranges and Nullarbor Plain were not matched with contemporary records, suggesting a range contraction to the central desert regions. Habitat preferences were determined from 78 captures at 41 sites, which revealed that samphire, sedge and nitrebush habitats, along with spinifex grassland, were favoured. A high tolerance to high rabbit numbers, mining activity, moderate cattle grazing pressures and cohabitation with Mus domesticus was evident. Pseudomys desertor is sometimes diurnal, possibly as a result of the time-consuming and regular foraging requirements of its folivorous diet. High mortality rates, resulting from prolonged exposure to predators, and lack of complex deep burrow systems are offset by its high fecundity and ecological plasticity. We consider that P. desertor is secure in the north-western arid zone of South Australia.

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31

Graham, Kristy, Grant Blackwell, and Dieter Hochuli. "Habitat use by the Hastings River mouse,Pseudomys oralis." Australian Zoologist 33, no. 1 (June 2005): 100–107. http://dx.doi.org/10.7882/az.2005.007.

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32

Predavec, Martin. "Variable Energy Demands in Pseudomys hermannsburgensis: Possible Ecological Consequences." Australian Journal of Zoology 45, no. 1 (1997): 85. http://dx.doi.org/10.1071/zo96062.

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The energy metabolism of Pseudomys hermannsburgensis, a native Australian desert rodent, was investigated with animals captured in the field. Animals showed large variation in basal metabolic rate between two time periods [November 1991 (1·40 ± 0·38 mL 0 2 g-1 h-1 ) and September 1992 (3·58 ± 0·24)], producing values that generally differed from those predicted from body mass. P. hermannsburgensis also entered torpor, which has not been demonstrated previously in an Australian rodent. Environmental stimuli for changes in metabolic rates are not clear. Possible ecological advantages of the observed patterns of energy metabolism are conservation of energy and water and increased longevity. All three factors may be considered adaptations to the variable desert environment.

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33

Woods, Richard, and Gerard Kennedy. "Circadian Activity Rhythms of Captive Heath Rats (Pseudomys shortridgei)." Wildlife Research 24, no. 4 (1997): 459. http://dx.doi.org/10.1071/wr96046.

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The activity rhythms of four male and four female heath rats (Pseudomys shortridgei) were monitored under natural lighting for 35 days. Activity was detected with passive infrared sensors and recorded on data loggers. Data down-loaded from the loggers were plotted as actograms on a line-printer. During the 35-day recording period, all heath rats showed a markedly nocturnal activity pattern, with 87·7% of activity occurring during the night. In all heath rats, activity levels increased markedly across the night. Activity was bimodally distributed, with the highest levels occurring just prior to dawn. However, a second smaller peak in activity occurred just after dusk. With increasing seasonal photoperiod, all heath rats showed a concomitant compression of nocturnal activity. Little difference was found between activity patterns of males and females. Male heath rats displayed 85·7% (s.d. 4·8%) of their activity at night while females showed 89·7% (s.d. 5·4%) of their activity at night. During the daylight hours, heath rats remained in their nest boxes and emerged on most days just prior to, or at, sunset. The pattern of activity observed in these captive heath rats appears to be more nocturnal than that of heath rats living under natural conditions. This difference may reflect the fact that, in captivity, food was available ad libitum and was of high quality. In the natural habitat, heath rats probably have to spend more time foraging, and food may be of poorer quality. The additional time spent foraging would extend activity into the daylight hours.

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34

Meek, PD. "The nest of the Hastings River mouse Pseudomys oralis." Australian Mammalogy 24, no. 2 (2002): 225. http://dx.doi.org/10.1071/am02225.

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THE most detailed information on the burrows and nests of Australian small mammals are reported by Watts and Aslin (1981). The nests of several species of Pseudomys have been described and vary between species. Three nests of the New Holland mouse Pseudomys novaehollandiae were excavated from sand burrows and described as being partially comprised of Eucalypt leaves (Kemper 1981). In South Australia, silky mice P. apodemoides construct nests of shredded bark within a nest chamber of approximately 15 cm (Watts and Aslin 1981). The desert mouse P. desertor reputedly builds dry grass nests in shallow constructions (Read et al.1999) and the long-tailed mouse P. higginsi and eastern chestnut mouse P. gracilicaudatus, delicate mouse P. delicatulus and Gould?s mouse P. gouldii all construct nests of plant material (Watts and Aslin 1981; Green 1993; Fox 1995) mostly grass. The nests of the smokey mouse P. fumeus are constructed of dried grass and Allocasuarina needles that are shaped in a cup form (10-15cm in diameter) (Woods and Ford 2000).

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35

Lock, M. L., and B. A. Wilson. "The distribution of the New Holland mouse (Pseudomys novaehollandiae) with respect to vegetation near Anglesea, Victoria." Wildlife Research 26, no. 4 (1999): 565. http://dx.doi.org/10.1071/wr97050.

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The distribution and abundance of the New Holland mouse (Pseudomys novaehollandiae) was assessed at Anglesea, Victoria, between February 1995 and October 1996. Twenty sites were trapped within the Forest Road Flora Reserve during April and May 1995. The twenty sites were distributed over four vegetation communities, and four successional post-fire ages. Pseudomys novaehollandiaewas found at only four sites, two located in heathy woodland vegetation, and two within a regenerating pine plantation. All four sites had a post-fire age of 7-9 years. Sites inhabited by P. novaehollandiae were found to have a high floristic richness of heath plants, and density of the understorey vegetation was greatest at a level below 20 cm. The population density of P. novaehollandiae was found to be high (10-20 ha-1 ) during early 1995 but declined after June 1995 to 3-10 ha-1 . Home ranges of males and females were similar and overlap occurred amongst individuals at the four sites, indicating that the populations on the four grids formed a single contiguous population.

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36

Chen, Michael S., Jing-Ping Sun, and Craig R. Asher. "A Right Atrial Mass and a Pseudomass." Echocardiography 22, no. 5 (May 18, 2005): 441–44. http://dx.doi.org/10.1111/j.1540-8175.2005.04049.x.

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37

Halpern, E. J., and L. G. Gomella. "Pseudomass of the bladder neck after prostatectomy." Ultrasound in Medicine & Biology 29, no. 5 (May 2003): S127. http://dx.doi.org/10.1016/s0301-5629(03)00525-8.

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38

Markle, B. M., and L. Catena. "Bladder pseudomass following cystography-related bladder trauma." Radiology 159, no. 1 (April 1986): 265. http://dx.doi.org/10.1148/radiology.159.1.3513250.

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39

Meulman, E. P., N. l. Klomp, and J. L. Samuel. "Observations of the Gross and Microscopic Anatomy of the Gastrointestinal Tracts of the Heath Mouse Pseudomys shortridgei and the Swamp Rat Rattus lutreolus (Rodentia: Muridae)." Australian Mammalogy 21, no. 1 (1999): 131. http://dx.doi.org/10.1071/am99131.

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Gastrointestinal tracts of the Heath Mouse Pseudomys shortridgei and the Swamp Rat Rattus lutreolus were examined. Each species had a relatively simple stomach divided into non-glandular and glandular areas, a well-developed caecum, and long mucosal folds within the proximal colon. The observed gut anatomy of both species is consistent with possible adaptation to hindgut fermentation.

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40

Breed, W. G. "Conservation status of the Plains Rat Pseudomys australis (Rodentia: Muridae)." Australian Mammalogy 14, no. 2 (1991): 125. http://dx.doi.org/10.1071/am91013.

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41

Weaver, H. J., and L. R. Smales. "Parasite Assemblages of Australian Species of Pseudomys (Rodentia: Muridae: Murinae)." Journal of Parasitology 98, no. 1 (February 2012): 30–35. http://dx.doi.org/10.1645/ge-2747.1.

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42

Wilson, BA, and WS Laidlaw. "Habitat characteristics for New Holland mouse Pseudomys novaehollandiae in Victoria." Australian Mammalogy 25, no. 1 (2003): 1. http://dx.doi.org/10.1071/am03001.

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Pseudomys novaehollandiae is ‘Endangered’ in Victoria, where it is presently considered to be extant at only three localities Loch Sport, Providence Ponds, and Wilsons Promontory. This study aimed to determine indicators of suitable habitat for the species that could assist in identifying potential habitat and sites for planned re-introductions as part of a recovery program. Vegetation and site data (soils, topography, rainfall, fire age-time since fire) were assessed at localities where P. novaehollandiae was recorded. The species occurred in five structural vegetation groups - open-forest, woodland, heathland, shrubland, grassland, with the most common being open-forest and woodland. Grassland and shrubland were restricted to coastal sand-dunes in south Gippsland. Understorey vegetation at most sites was dominated by sclerophyllous shrubs ranging in cover from 10 - 70%. Classification of quadrats produced eight floristic groups in which the trend was for quadrats to cluster according to geographical location. Ordination confirmed the classification pattern and vector-fitting produced significant correlations between vector points and five variables: species richness, latitude, longitude, fire age and annual rainfall. The study identified a range of vegetation communities where P. novaehollandiae occurs and provided evidence that the species is not restricted to floristically rich and diverse heathlands. The findings can be used to determine further localities with suitable habitat. However, factors other than vegetation are also likely to be important in predicting suitable habitat.

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43

Masters, P. "The effects of fire-driven succession and rainfall on small mammals in spinifex grassland at Uluru National Park, Northern Territory." Wildlife Research 20, no. 6 (1993): 803. http://dx.doi.org/10.1071/wr9930803.

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Fire-driven succession and a period of high rainfall had a pronounced effect on the distribution and abundance of small mammals inhabiting spinifex grassland in Uluzu National Park from 1987 to 1990. Species richness and abundance were generally higher on sites burnt in 1976, where six species (Pseudomys hermannsburgensis, Pseudomys desertor, Mus domesticus, Dasycercus cristicauda, Ningaui ridei and Sminthopsis youngsoni) were caught more frequently. Two species (Notomys alexis and Sminthopsis hirtipes) were more abundant on sites burnt in 1986. Murid rodent numbers fluctuated substantially following high rainfall. The number of individuals increased 100-fold, and species richness increased from two to four when P. desertor and M. domesticus appeared in the second year of the study. In contrast, captures of dasyurid marsupials increased only slightly over the three years, with the most dramatic increase occurring for D. cristicauda. This study highlights the importance of fire as a management tool. Patch burning within spinifex grasslands maximises species diversity of small mammals by ensuring that suitable successional states are present at all times. This is particularly important for species that are restricted in their distribution, such as D. cristicauda

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44

Thompson,, G. G., and S. A. Thompson. "Abundance and distribution of five small mammals at a local scale." Australian Mammalogy 30, no. 2 (2008): 65. http://dx.doi.org/10.1071/am08008.

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In an area of approximately 210 ha 5 km west of South Hedland in Western Australia the population density of Dasycercus cristicauda (mulgara) was higher than 0.23 per ha, Dasykaluta rosamondae (little red kaluta) was higher than 1.88 per ha and Pseudomys hermannsburgensis (sandy inland mouse) was higher than 4.90 per ha. Densities for D. rosamondae and P. hermannsburgensis were appreciably higher than those reported elsewhere in the Pilbara. D. rosamondae and P. hermannsburgensis appear to be evenly distributed across the site, whereas D. cristicauda were concentrated in the centre and the western edge away from areas of higher vehicle traffic. The spatial distribution of Pseudomys desertor (desert mouse) was focussed on two areas. A trapping effort of 9,900 trap-nights appears to have captured most of the D. cristicauda but not all of the D. rosamondae, indicating that their density was higher than reported above. Approximately five D. cristicauda were caught per 1000 trap-nights, and given that this species was not evenly spread across the site, these data suggest that the survey effort necessary to detect the presence of D. cristicauda needs to be much higher than is the current practice of environmental consultants.

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Castro, Mariana, João Abecasis, and Tiago Nolasco. "A Left Atrial Pseudomass Following Aortic Valve Replacement." Revista Española de Cardiología (English Edition) 72, no. 7 (July 2019): 577. http://dx.doi.org/10.1016/j.rec.2018.05.014.

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46

Yekeler, Ensar, Basak Kumbasar, Memduh Dursun, Serdar Cantez, Halil Haldun Emiroglu, and Mehtap Tunaci. "Pseudomass of the sternal manubrium in osteogenesis imperfecta." Skeletal Radiology 32, no. 6 (May 1, 2003): 371–73. http://dx.doi.org/10.1007/s00256-003-0639-8.

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47

Wong, A. D., M. Pon, and M. Grymaloski. "An ultrasonic hepatic pseudomass due to colonic interposition." Journal of Clinical Ultrasound 16, no. 9 (November 1988): 669–71. http://dx.doi.org/10.1002/jcu.1870160910.

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48

Letnic, M. "Long distance movements and the use of fire mosaics by small mammals in the Simpson Desert, central Australia.." Australian Mammalogy 23, no. 2 (2001): 125. http://dx.doi.org/10.1071/am01125.

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Using recapture data and radio-telemetry, the movement patterns of small mammals occupying burned and unburned habitats in the Simpson Desert, western Queensland were investigated. Long-term, between trap sessions, recapture rates of small mammals ranged from 7.3 % for Sminthopsis youngsoni to less than 1 % for Pseudomys desertor. Seventeen individuals including Pseudomys hermannsburgensis, S. youngsoni and Notomys alexis were observed to make longdistance movements (> 500 m). The longest recorded movement in this study was 5.7 km by a male S. youngsoni. Telemetry and recapture data indicate that individual P. hermannsburgensis, S. youngsoni and N. alexis can move more than 700 m and up to 2 km in a single night. Radiotracked P. hermannsburgensis and N. alexis utilised a mosaic of burned and unburned habitats in a single night of foraging. Low rates of recapture for small mammals in the Australian arid zone suggest that the populations of many species consist largely of transient individuals. Some species of small mammals appear to have sufficient mobility to locate resource rich patches and utilise habitat mosaics along a continuum of scales. These range from long-distance and presumably unidirectional migrations of 10 km or more, through to nightly movements in the order of several hundred metres to 1 - 2 km.

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Burns, Phoebe A., Marissa L. Parrott, Kevin C. Rowe, and Benjamin L. Phillips. "Identification of threatened rodent species using infrared and white-flash camera traps." Australian Mammalogy 40, no. 2 (2018): 188. http://dx.doi.org/10.1071/am17016.

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Camera trapping has evolved into an efficient technique for gathering presence/absence data for many species; however, smaller mammals such as rodents are often difficult to identify in images. Identification is inhibited by co-occurrence with similar-sized small mammal species and by camera set-ups that do not provide adequate image quality. Here we describe survey procedures for identification of two small, threatened rodent species – smoky mouse (Pseudomys fumeus) and New Holland mouse (P. novaehollandiae) – using white-flash and infrared camera traps. We tested whether observers could accurately identify each species and whether experience with small mammals influenced accuracy. Pseudomys fumeus was ~20 times less likely to be misidentified on white-flash images than infrared, and observer experience affected accuracy only for infrared images, where it accounted for all observer variance. Misidentifications of P. novaehollandiae were more common across both flash types: false positives (>0.21) were more common than false negatives (<0.09), and experience accounted for only 31% of variance in observer accuracy. For this species, accurate identification appears to be, in part, an innate skill. Nonetheless, using an appropriate setup, camera trapping clearly has potential to provide broad-scale occurrence data for these and other small mammal species.

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Kitchener, A. C. "A western mouse (Pseudomys occidentalis) from King George Sound, Western Australia." Australian Mammalogy 15, no. 1 (1992): 153. http://dx.doi.org/10.1071/am92025.

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